diff --git a/decision-task.py b/decision-task.py
index ac6c66ca3ff..a4b3a288156 100644
--- a/decision-task.py
+++ b/decision-task.py
@@ -19,8 +19,8 @@ def main():
 
     # FIXME: remove this before merging in servo/servo
     os.environ["GIT_URL"] = "https://github.com/SimonSapin/servo"
-    os.environ["GIT_REF"] = "refs/heads/taskcluster-experiments-20180918"
-    os.environ["GIT_SHA"] = "605d74c59b6de7ae2b535d42fde40405a96b67e0"
+    os.environ["GIT_REF"] = "refs/heads/taskcluster-experiments-20180920"
+    os.environ["GIT_SHA"] = "a6dbfdd29f9b3f0ce0c13adc79fad99538a9a44b"
     decision.docker_image_cache_expiry = "1 week"
     decision.route_prefix = "project.servo.servo-taskcluster-experiments"
     # ~